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Re: -[NSThread start] blocks ?!?
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Re: -[NSThread start] blocks ?!?


  • Subject: Re: -[NSThread start] blocks ?!?
  • From: Jerry Krinock <email@hidden>
  • Date: Sat, 17 Oct 2015 19:25:53 -0700

> On 2015 Sep 28, at 13:10, Greg Parker <email@hidden> wrote:
>
> The threads listed are all waiting for a spinlock used by the debugging tools. (Specifically, it's the machinery that records stack traces of queue operations.)
>
> If you see this again, please capture a spindump and file a bug report.
>
> After you file the bug report, you might be able to work around it like this:
>    defaults write com.apple.dt.Xcode DBGSkipRecordedFrames -bool YES
> then quit and relaunch Xcode.

Just to follow up on this – no bug report because the deadlock has not recurred since Sept 26.  So it could indeed be a debugger bugger as you suggest, Greg.  I had been using Xcode 6 for this project back on Sept. 26, but it is now on Xcode 7.


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